Determining localized anode condition to maintain effective corrosion protection.

Nguyen, Vinh; Meuli, Josh; Brooks, Bill; Jansen, Henri; Westall, John; Koretsky, Milo

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Determining localized anode condition to maintain effective corrosion protection.

2010-01-01
By Nguyen, Vinh ; Meuli, Josh ; Brooks, Bill

File Language:

English

Details

Creators:

Nguyen, Vinh ; Meuli, Josh ; Brooks, Bill ; Jansen, Henri ; Westall, John ; Koretsky, Milo
Corporate Creators:

Oregon State University
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA-OR-RD-10-11
Resource Type:

Tech Report
Geographical Coverage:

Oregon
Edition:

Final report.
Corporate Publisher:

Oregon. Dept. of Transportation. Research Section
Abstract:

Thermal sprayed zinc anodes used for impressed current cathodic protection of reinforced concrete deteriorate over time. ; Two different technologies, ultrasound and electrical circuit resistance combined with water permeability, were ; investigated in the laboratory to determine whether they were feasible methods for estimating anode condition. The ; ultrasonic method was unable to detect a reflected acoustic signal from zinc-on-concrete specimens due to scattering of the ; signal within the samples. Circuit resistance was shown to increase with the electrochemical age of the specimens, but the ; resistance trend did not correlate with the bond strength trend at later ages. The aged specimens were fairly impermeable ; to water infiltration presumably due to build up of reaction products in the porosity. Consequently, a method of using ; resistance measurements combined with water infiltration to determine anode condition was not successful. It was shown ; that the permeability improved if the surface was mechanically perturbed such as creating a pin hole. Improving ; permeability by penetrating the surface could have ramifications for improving anode performance.
Format:

PDF
Funding:

SPR 653
Download URL:

https://rosap.ntl.bts.gov/view/dot/21778/dot_21778_DS1.pdf
File Type:

[PDF - 8.93 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:e98fd55ce808fa7a47f146344b6f52283ae6f68367e5edbfbbd8468c5d864fccbc93c8f9b990f32bc302155a2032ff3319726f59c08a34dae3a27c9a4994bf8e

File Language:

English

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